LLVM optional target-cpu features enabled by default

[wesleywiser]

Meeting proposal info

• Title: LLVM optional target-cpu features enabled by default
• Type: technical

Summary

Continue discussion of rust-lang/rust#125033

About this issue

This issue corresponds to a meeting proposal for the compiler team
steering meeting. It corresponds to a possible topic of
discussion. You can read more about the steering meeting procedure
here.

Comment policy

These issues are meant to be used as an "announcements channel"
regarding the proposal, and not as a place to discuss the technical
details. Feel free to subscribe to updates. We'll post comments when
reviewing the proposal in meetings or making a scheduling decision.
In the meantime, if you have questions or ideas, ping the proposers
on Zulip (or elsewhere).